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  • 1,260. Re: iPhone 4s Battery Life?
    fatboyslick Level 1 Level 1 (0 points)

    Erm....how do I unsubscribe to this (I dont remember subscribing) as the constant email

    Notifications are killing the battery even more!

  • 1,261. Re: iPhone 4s Battery Life?
    TimothyW Level 1 Level 1 (0 points)

    Not exactly... you're somewhat mixing up the issues. If a battery runs hot due to being overdrawn on current, then yes internal damage will occur.

     

    If the PHONE is hot due to the chipset running at a higher utilization rate, then there is no damage to the battery. Apple uses Lithium Polymer (LiPo) batteries and the iPhone likely consumes less than 5W with FULL brightness and 100% A5 utilization (CPU & GPU).

     

    LiPo's can output 5W without generating a bit of heat...

     

    In other words, don't worry about your batteries, just fix the SW issue that's making the A5 work harder than it needs to. (BTW - the issue is having Calendar/Exchange events shown in Notification Center. There is an endless loop there... Once disabled, your problems will go away)

  • 1,262. Re: iPhone 4s Battery Life?
    H7O Level 1 Level 1 (0 points)

    here is the solution I managed to find that will hopefully work for everyone.

     

    Hopefully each 1% of battery life should last you no less than 1.5 -2 hours of standby time after this fix.

     

    1- plug your iPhone to iTunes and select "restore". (it has to be through iTunes, resetting settings and media via the phone won't work)

     

    2- once your phone finishes restoring the iOS, iTunes will then ask you if you would like to restore your content from a backup or configure your iPhone 4S as a new phone. Choose to configure as a new phone.

     

    3- open your phone to go through the initial iOS5 welcome setup wizard screens. You can enable everything, but you should disable iCloud.

     

    after step #3 you should have a huge difference in battery life. And to even maximize it to 2+ hours per 1% of battery life, do the following after doing the above steps:

     

    4- Let your iPhone 4S run down to 1% and do a full cycle charge (there are several apps in the app store that can help you do a full cycle charge. (I don't know if I'm allowed to mention a product name here. so I'll leave that for you to search for it)

     

    After step #4, each 1% of battery life will hopefully last you no less than 2+ hours of standby time. (of course all the other battery statistics advertised by Apple should now start to apply to your iPhone 4S and match your experience too).

     

    Hope this helps both users and Apple engineers to diagnose and solve this issue in future patch.

  • 1,263. Re: iPhone 4s Battery Life?
    laker2000 Level 1 Level 1 (0 points)

    TimothyW,

      This sounds like reasonable explaination.  I will give it a try and report back to the forum.

  • 1,264. Re: iPhone 4s Battery Life?
    mollib Level 2 Level 2 (460 points)

    TimothyW wrote:

     

    iPhone 4S Poor Battery Performance SOLVED!!

     

    I found the issue with the iPhone 4S battery performance.

     

    ...

     

    What was the difference? I have my phone connected to Exchange for my corporate email. But exchange is not exactly the problem. The issue is in Notification Center. For some reason, I had hundreds of calendar reminders that kept refreshing on notification center. Furthermore, the reminders would flicker between the time remaining and the start time for the event at such a fast rate that it could not be read...

     

    What is the solution? Go to Settings>Notifications>Calendar and disable Notification Center. You can still have the alert style set to Banners, or Alerts and you will still receive notices about your events, but it will not BUILD a summary in the Notification Center window. This is were the BUG exists. Oddly, this does not affect my iPad 2, but is an issue for iOS 5 on the iPhone (different builds, maybe?)

     

    So, it appears that Notification Center has an endless loop in collecting the calendar events from Exchange and this is burning up our 4S batteries. Once you stop the madness from Notification Center, your iPhone 4S will perform as advertised.

     

    Enjoy!

    Tim

     

    I don't think you can blanketly say "this a problem for everyone." I have my Exchange showing Calendar events in my Notification Center and it's causing zero problems for me.

     

    Like every other problem that's been reported, nothing affects everyone. Maybe there's some underlying problem that's manifesting in various ways across various devices, but from what I've seen, there's no one cause (like the FB app or Location Services or MobileMe accounts) that's creating problems for every single person who has that thing in their setup.

  • 1,265. Re: iPhone 4s Battery Life?
    mollib Level 2 Level 2 (460 points)

    fatboyslick wrote:

     

    Erm....how do I unsubscribe to this (I dont remember subscribing) as the constant email

    Notifications are killing the battery even more!

     

    In the upper-ish right part of the page, under Actions, click on "Stop email notifications." When you reply to the thread, you're automatically subscribed.

  • 1,266. Re: iPhone 4s Battery Life?
    Nutes Level 1 Level 1 (0 points)

    if I do this will I have to reorganize all my app's/folders again?  what about all my contacts?

  • 1,267. Re: iPhone 4s Battery Life?
    MarieEveF Level 1 Level 1 (0 points)

    Ok I will look like a terrible newb, witch I am.....But i just discovered that since all this time...ALL the applications that I ever opened were still running in the background....Now I just closed them all....Let's see now if it makes a difference.....Let's hope!

     

    I could imagine that all maybe 20 application running in the background might drains the battery, no??

  • 1,268. Re: iPhone 4s Battery Life?
    VailGeek Level 1 Level 1 (0 points)

    Same here... iPhone 4S battery life is suffering. Just for giggles last night I did this:

     

    1. Gave the iPhone 4S a full charge

    2. Switched it over to Airplane Mode... made sure all apps were closed.

    3. Unplugged the iPhone from power supply and set it next to my bed.

     

    When I awoke 7 hours later the phone had lost 2% of it's battery power and was down to 98%.

     

    I thought my battery life had been suffering because I live in a mountainous region. Since we have lost the option to switch to 2G or Edge network my battery life is suffering... terribly.

     

    So I'm asking for 2 things.

     

    1. Bring back the ability to force the phone back over to 2G/EDge

    2. Imporove processor handleing so that the buden on the battery isn't as great.

     

    Thanks

  • 1,269. Re: iPhone 4s Battery Life?
    SebGood Level 1 Level 1 (0 points)

    This seems to have resulted in drastic improvement for me. And I had also noticed the calendar issue with notification center. I once opened notification center and the calendar entries were constantly flipping around non-stop in some kind of endless loop. I've now removed calendar from notification center and the battery performance is better.

     

    TimothyW wrote:

     

    iPhone 4S Poor Battery Performance SOLVED!!

     

    I found the issue with the iPhone 4S battery performance.

     

    I bought 2 iPhone 4S models on the first day. One for my wife and one for me. The strange thing was that mine would kill the battery in 4-6 hours and ran VERY WARM to the touch. My wife's phone worked great. It was cold to the touch. She would forget to charge it at night... and the battery performance was great... even better than our prior 3GS models.

     

    What was the difference? I have my phone connected to Exchange for my corporate email. But exchange is not exactly the problem. The issue is in Notification Center. For some reason, I had hundreds of calendar reminders that kept refreshing on notification center. Furthermore, the reminders would flicker between the time remaining and the start time for the event at such a fast rate that it could not be read...

     

    What is the solution? Go to Settings>Notifications>Calendar and disable Notification Center. You can still have the alert style set to Banners, or Alerts and you will still receive notices about your events, but it will not BUILD a summary in the Notification Center window. This is were the BUG exists. Oddly, this does not affect my iPad 2, but is an issue for iOS 5 on the iPhone (different builds, maybe?)

     

    So, it appears that Notification Center has an endless loop in collecting the calendar events from Exchange and this is burning up our 4S batteries. Once you stop the madness from Notification Center, your iPhone 4S will perform as advertised.

     

    Enjoy!

    Tim

  • 1,270. Re: iPhone 4s Battery Life?
    mollib Level 2 Level 2 (460 points)

    MarieEveF wrote:

     

    Ok I will look like a terrible newb, witch I am.....But i just discovered that since all this time...ALL the applications that I ever opened were still running in the background....Now I just closed them all....Let's see now if it makes a difference.....Let's hope!

     

    I could imagine that all maybe 20 application running in the background might drains the battery, no??

     

    I don't think they were all really running in the background. They might have all shown up in the multi-tasking bar, but some of them probably died/stopped running at some point since you originally ran them (the phone killed them off on its own or you did by restarting the phone). The icons are still accessible there, but it's not likely that all twenty proccesses were still puttering around in the background. The app icon does not disappear from the multi-task bar if the app process dies.


    That being said, there are some apps that are more processor intensive than others, so if you had some of those going recently, then yeah, they could definitely be draining your battery faster than if you didn't have any apps running at all.

  • 1,271. Re: iPhone 4s Battery Life?
    robhoward88 Level 1 Level 1 (0 points)

    I've turned off all iCloud syncing and my battery has been much better. I just tried turning iCloud back on and immediately felt my battery heat up. I've now turned it off again and booked to see a Genius on Sunday. Also, I've got Push turned off entirely. Instead I've enabled Fetch every 30 mins.

     

    Something is definitely not right as I should be able to use iCloud and push email without it killing my battery but until Apple figure it out I'm glad just to have an iPhone 4S.

     

    May the Battery Power be with you.

  • 1,272. Re: iPhone 4s Battery Life?
    MarieEveF Level 1 Level 1 (0 points)

    Ok. So maybe it will help. I also deleted my professionnal email, Maybe it will change something....I don't know what is an exchange email, but whatever, I deleted one out of two...And as a matter of fact, when I think about it, i always had problems getting the emails of this account,,,the messages would disappears after i read it, etc....So maybe this is part of the problem....

     

    Maybe here, maybe there.....Just hope we''ll finally all find a solution.

  • 1,273. Re: iPhone 4s Battery Life?
    MarinoQB1 Level 1 Level 1 (0 points)

    Same here. I have to charge twice a day at least.

  • 1,274. Re: iPhone 4s Battery Life?
    mashford Level 1 Level 1 (0 points)

    Thank you.  I can confirm that this solution acutally worked for me.  I was performing the restore but applying my saved back up.  The restore ONLY worked for me once I restored as new and then put all of my info and apps back on.  Everything is enabled...wifi.. Siri...location services..AND location reminders.. I did a full charge at 6AM.. 7 hours later I have 75% power.  Before this fix, i would have had to charge the phone 2X by now.

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